When I worked an office job I used to hate Mondays, just like everyone else. It's normal to not enjoy going back to your workplace after the weekend, especially if you're working for someone else and you don't care much for your work.
Nowadays I work nights, so Mondays are no longer a problem for me, cause all nights are roughly the same. Well not exactly, Friday and Saturday nights can get weird since people go to clubs, get drunk and I sometimes have "guests" at the parking lot
Regarding Monday as a working day, you can talk a lot and first of all, a bad Monday because of the fact that all weekend you can either rest or walk, So relaxing, on Monday the day starts very badly. But if a person is in a tonus and in tension not for 1 week, then he just gets tired but the working cycle remains.Nowadays I work nights, so Mondays are no longer a problem for me, cause all nights are roughly the same. Well not exactly, Friday and Saturday nights can get weird since people go to clubs, get drunk and I sometimes have "guests" at the parking lot